Brewer earned the ranking because she attempted to oust Colleen Coyle Mathis, the chair of a bipartisan effort to redistrict Arizona, using a combination of state and nonprofit money to fund a trip to Europe and backing a voter-approved requirement for Arizonans to show proof of citizenship when registering to vote, among other things.

The report also called Brewer a "clown" of a governor.

The list included 16 Republicans. Only two of the governors are Democrats.

Brewer did not appear in a similar report compiled in 2010.

Overall, the report said Georgia Gov. Nathan Deal was the nation's worst governor.